December weather forecastRadnor, OH
December
Weather in December
December, the first month of the winter in Radnor, is also a wintry month, with an average temperature fluctuating between 38.3°F (3.5°C) and 28.6°F (-1.9°C).Temperature
The onset of December coincides with a reduction in the average high-temperature, falling from a chilly 48.6°F (9.2°C) in November to a cold 38.3°F (3.5°C). Radnor's nights in December cool down to an average low-temperature of 28.6°F (-1.9°C).Humidity
In December, the average relative humidity is 82%.Rainfall
In Radnor, in December, during 11.9 rainfall days, 2.44" (62mm) of precipitation is typically accumulated. Throughout the year, there are 172.1 rainfall days, and 32.01" (813mm) of precipitation is accumulated.Snowfall
Months with snowfall in Radnor, Ohio, are January through April, October through December. In Radnor, in December, snow falls for 10.3 days, with typically accumulated 2.87" (73mm) of snow. Throughout the year, in Radnor, there are 46.8 snowfall days, and 13.58" (345mm) of snow is accumulated.Daylight
December has the shortest days of the year in Radnor, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:36 am and sunset at 5:06 pm. On the last day of December, in Radnor, sunrise is at 7:55 am and sunset at 5:16 pm EST.
Sunshine
In December, the average sunshine is 4.1h.UV index
The months with the lowest UV index in Radnor are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 2 during December translates into the following guidance:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Radnor, OH
- Average high temperature in December: 38.3°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (32°F).
- Average low temperature in December: 28.6°F
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure in December
Radnor, OH
- Average pressure in December: 30.12"Hg
The months with the highest atmospheric pressure are January and November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Radnor, OH
- Average wind speed in December: 9.2mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in December
Radnor, OH
- Average humidity in December: 82%
The month with the highest relative humidity is January (84%).
The months with the lowest relative humidity are October and November (75%).
Average rainfall in December
Radnor, OH
- Average rainfall in December: 2.44"
The wettest month (with the highest rainfall) is May (3.82").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in December
Radnor, OH
- Average rainfall days in December: 11.9 days
The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is February (10 days).
Average snowfall in December
Radnor, OH
- Average snowfall in December: 2.87"
The month with the highest snowfall is January (3.46").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Radnor, OH
- Average snowfall days in December: 10.3 days
The month with the highest number of snowfall days is January (13.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Radnor, OH
- Average daylight in December: 9h and 18min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Radnor, OH
- Average sunshine days in December: 11.6 days
The month with the most sunshine days is November (16.1 days).
The month with the least sunshine days is February (9.1 days).
Average UV index in December
Radnor, OH
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Radnor, OH
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Radnor, OH
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
